<template>
	<div>
		<div class="search">
			<input v-model="keyword" class="search-input" type="text" placeholder="输入城市名或拼音">
		</div>
		<div class="search-content" ref="search" v-show="keyword">
			<ul>
				<li class="search-item border-bottom" v-for="item of list" :key="item.id" @click="handleCityClick(item.name)">{{item.name}}</li>
				<li class="search-item border-bottom" v-show="hasNoData">没有找到匹配数据</li>
			</ul>
		</div>
	</div>
</template>

<script>
import Bscroll from 'better-scroll'
import { mapMutations } from 'vuex'
export default {
	name: 'CitySeader',
	props: {
		cities: Object
	},
	data () {
		return {
			keyword: '',
			list: [],
			timer: null
		}
	},
	computed: {
		hasNoData () {
			return !this.list.length
		}
	},
	watch: {
		keyword () {
			if (this.timer) {
				clearTimeout(this.timer)
			}
			//如果输入为空，则无显示
			if (!this.keyword) {
				this.list = []
				return
			}
			this.timer = setTimeout(() => {
				const result  = []
				for (let i in this.cities) {
					this.cities[i].forEach((value) => {
						if (value.spell.indexOf(this.keyword) > -1 || value.name.indexOf(this.keyword) > -1) {
							result.push(value)
						}
					})
				}
				this.list = result
			},100)
		}
	},
	methods: {
		handleCityClick (city) {
			this.changeCity(city)
			this.$router.push('/')
		},
		...mapMutations(['changeCity'])
	},
	mounted () {
		this.scroll = new Bscroll(this.$refs.search)
	}
}	
</script>

<style lang="stylus" scoped>
@import '~styles/varibles.styl'
.search
	height: .72rem
	padding: 0 .1rem
	background: $bgColor
	.search-input
		box-sizing: border-box
		width: 100%
		height: .62rem
		padding: 0 .1rem 
		line-height: .62rem
		text-align: center
		border-radius: .06rem
		color: #666
		//touch-action: none
.search-content
	z-index: 1
	overflow: hidden
	position:absolute
	top: 1.58rem
	left: 0
	right: 0
	bottom: 0
	background: #eee
	.search-item
		line-height: .62rem
		padding-left: .2rem
		background: #fff
		color: #666
</style>